Valve-spring compressor



'Jam 19,1926, 1,570,039

G. D. BUSSARD VALVE SPRING COMPRESSOR Filed Jan. 3, 1925 Grover D. BHS-90rd fyi?. J www? Patented Jan. 19, 1926.

UNITED STATES GROVER D. BUSSARD, OF LITTLIETON, COLORADO.

VALVE-SPRING COMPRESSOR.

Application iled January 3, 19525.l Serial No. 333.

To all whom t may concern.'

Be it known that I, Gnovnn D. BUssAi-m, citizen of the United States of America, residing at Littleton, county of Arapahoe, and State of Colorado, have invented certain new and useful Improvements in Valve-Spring Compressors; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being'had to the accompanying drawings, and to the characters of reference marked thereon, which form a part of this specifb cation.

This invention relates to improvements in valve spring compressors.

Internal combustion engines of the type employed in connection with automobiles are, with a few exceptions, provided with intake and exhaust valves of the poppet type. Poppet valves are held against their seats by means of helical springs, one end of which abuts a disk held in place on the stem by means of a removable pin. Before a valve can be removed it is necessary to remove the pin and this can only be done after the spring has been compressed enough to permit the disk to be moved suf iciently to allow the pin to be removed. The springs that hold the valves in place are usuall quite powerful and resort must therefore be had to a special tool for the purpose of compressing the same.

I am aware that several specifically different kinds of valve spring compressors have been invented and that some of these are used with more or less success.

It is the object of this invention to produce a valve compressor that shall be of simple, cheap and substantial construction and which can be employed with equal facility in connection with ordinary poppet valve engines and with valve in head engines.

It is a further object of this invention to produce a device that can be easily assembled and disassembled so that it can readily be packed for shipment or carried in a tool box.

My invention can be most clearly eX- plained and will be most readily understood when reference is had to the accompanying drawing in which the preferred form thereof has been shown and in which Fig. 1 shows my device in position for compressing the valve spring.

Fig. 2 is a section taken on line 2-2 Fig. l.

Fig. 3 is a section taken on line 3 3 Fig. 1 and shows the pawl member in the proper position to make the ratchet device operative.

Fig. 4 is a section similar to Fig. 3 but shplwing the pawl in inoperative position, an

Fig. 5 shows my invention, with parts reversed, applied to a valve in head construction. Y

In Fig. 1 I have shown a portion of an engine block l which is provided with a port opening 2 that is closed bymeans of a valve 3. This .valve has a stem 4 that projects downwardly andris adapted to be engaged by the valve tappet 5. A disk shaped member 6 is applied to the valve stem 4 near the end thereof, and held in place thereon by means of a pin 7. A coil spring 8 encircles the stem, one end of this spring abuts the horizontal wall portion 9 of the engine block, while the other end rests on the disk 6. Spring 8 is normally of greater length than the distance from 9 to 6 and is therefore under compression wherefore it exerts a force which tends to move the valve 3 against its seat. When the valve is to be ground, or removed for any other purpose, the pin 7 must first be removed. This cannot be done unless the spring 8 is first compressed to such an extent that the pin 7 can be grasped by the lingers or by a tooln As the springs 7 are usually quite stiff and require a considerable force to compress them and as they are often located in such a position that they are not readily accessible it becomes necessary to provide a special tool for compressing them.

My im roved valve spring com ressor consists of a flat bar 10, one edge o which is provided with gear teeth 11 which adapt the bar to function as a rack. The side of the bar adjacent to'the other edge is provided with a series of ratchet teeth 12. Secured to the lower end of the bar 10 is a bracket 13 (Figs. 1 and This bracket is provided at its outer end with two spaced members 14 that are adapted to receive between them the stem 4land to engage the disk 6. The other end of bracket 13 has two spaced parallel members 15 adapted to receive the bar 10 to which the bracket is secured by means of a pin 16. It will be noted that the members 15 are provided nii fdl

with holes 17 whose function will hereinafter appear. Bracket 13 has a plate 18 projecting downwardly therefrom (Fig. l). This plate is adapted to engage the edge of the bar l so as to provide a stop means to resist rotation about the pin i6. secured bracket which has been designated by numeral if) is constructed exactly the same as the bracket 13 except tor this that the end, instead oi beh j f; forked. is curved downwardly in the manner indicated by numeral 2t). The point olf the part 2O adapted to engage the valve 3. The parts ol bracket ll) that correspond to 15 and 18 of bracket i3 have been designated as l5^ and 18A. A handle 2l has one end 'termed arcuate, as indicated by mnueral 2Q. This arcuate portion is provided with teeth 23 and is rotatable tln'ougfh an are ol substantially 180 degrees. It will be noticed that the teeth 2) do not project` over the line ot the upper edge of the handle and therefore when the handle is turned upwardly as far as it can gro the teeth 23 will .not engage with the teeth li, with the result that the bracket can be moved freely in any direction, so that it can be adjusted to the proper position. l'vhen the handle 2l moved downwardly or rotated clockwise about its pivot 2st the teeth Q3 and ll will engage and form a rack and pinion mechanism by means of which a stron;r torce can be exerted tendingr to move the brackets towards each other. Thon the parts are in the position shown by full lines .in Fig. l and the handle 2l rotated to dotted line position (Fig. l) the bar l0 and bracket lil will be moved to dotted line position which, obviously, compresses the spring; 5%. Ynless some ratchet means is prorided to prevent it, the spring S will more the brackets apart an soon as the handle is released. l have therefore pro vided each bracket with a dctent This deteut has been iown in section in Figs. 3 and l andA conf s of a tubular member 2G pro'. del with an axial opening' through which the pin extends. )t member 28 is seem-cd to the pin 2T and serves as an ahnte meut i'or the spr-ingr 29, which is under compression, and therefore exerts a. torce tendinea lo more the pin into engagement with the rati-hei teeth lil. ',lo the outer end of pin f2?. l secure a head 30. A pin 3l is serured to the head 30' and .is adapted to enter an opening in the end of member 26 in the manner shown in Fig. 3 in which position the pin Q7 is operative as a pawl. It the pawl and ratchet is not desired, the

pin 2i is withdrawn suiliciently to remove the pin 3l from the hole and the head 30 rotated slightly whereby the pin ill will engage the end oi member 2G and hold piu 2T in inoperative position.

Thon a` vulve in head motor is to be operated upon, the brackets 113 and i9 are prei'd erably reversed in the manner shown in The bracket l) fastened to the har .l0 by a pin 3Q and the handle QI. trans- 'Yerref'l to the bracket i3. ln itin". 5 l have shown the springn compressed.

It is evident that the device may readily be separated into its tour parts and that these can then be packed into a compara.- tively small space.

l desire to call attention at this point to the means that I have provided for adjusting the spreaifl ot the spaced members il so that they muy be moved apart to the extent required lo recciwl the larpest size valve stem. The part marked il is a separate member that is secured to member lll by a rivet which lits loosely in a hole in the part lll-A and permits the latter to move. il, pin 3G secured to member f5 serves as a guide and the screw 3T which has a rfitatahhI connection. with member i3 and a threaded connection with member l-l^ serves to move the latter with respect to the former and to spread the ends 1.4; to the extent required.

i'xlthough l have shown my device as eno ployed. in connection, with valves and valve springs, this is only one use to which it can hc put as it may be used wherever a clamp oll this type is needed.

Having now described my invention what l claim as new is:

i valve sprinfi' com ressor cominisinrr a rack having' gear teetiv along one side', a bracket secured to one end ot said rack and projectingr Vlaterally therefrom a second bracket slidably connected with the said rackJ said brackets lyingr substantially iu the same plane, a segmental pinion rotatably connected to the slidable bracket, said pinion beine' adapted to cooperate with the teeth on the rack in all but one. position. means for turnilmI said pinion. a pawl and ratchet device between the slidahle lnacket and the rack tor luiildiner the slidable bracket in adjustable position and a stop `plate projecting: outwardly from each bracket, said plates beine' adapted to engage the side of the rack.

ln testimony whereof I affix my GROVER D. BUSSARI).

signatu re. 

